1995-1998 Director General, Department of Asian Affairs, Ministry of Foreign Affairs (visiting scholar, School of Foreign Service, Georgetown University, the United States of America from August 1997 to February 1998)

1998-2001 Assistant Minister of Foreign Affairs and Director General of the Department of Policy Research

2001-2004 Vice Minister of Foreign Affairs

2004-2007 Ambassador Extraordinary and Plenipotentiary of China to Japan